There are so many distributions of Linux. Some of those distributions go a very long way to differentiate themselves. In other cases, the differences are so minimal, you wonder why anyone would have bothered reinventing that particular wheel.
MX Linux is a cooperative venture between the antiX and former MEPIS communities, using the best tools and talents from each distro. It is a midweight OS designed to combine an elegant and efficient desktop with simple configuration, high stability, solid performance and medium-sized footprint.
Debian is an operating system and a distribution of Free Software. It is maintained and updated through the work of many users who volunteer their time and effort.